TECHNIQUES FOR PRECISE RECORDING OF GRAY-SCALE IMAGES FROM COMPUTERIZED SCINTIGRAPHIC DISPLAYS

  • 1 January 1981
    • journal article
    • research article
    • Vol. 22  (3) , 283-286
Abstract
Accurate, reproducible recording of gray-scale images from a computer requires careful calibration and control of the factors affecting photographic exposure. These include exposure time, CRT [cathode ray tube] brightness and contrast, film type and photographic processing. A method for calibrating the imaging system is described. It accounts for nonlinear CRT phosphor and film response and permits the recording of the desired gray scale. The key to this technique is a graphical method for correlating the measured film response with the desired gray scale to develop a translation table that produces the desired gray scale on film. The technique is applicable to any computerized nuclear medicine display system.